hey everyone,
I have a problem, I can’t open the manager … when I click to open I see this
please help me … I wish I didn’t lose every thing in my account
thank you
You need to give some further info
What edition - Desktop, Cloud, Server?
Operating system?
Have you updated something recently?
It’s all in the screenshot(s) 
do you know how I can fix it??
I updated my Mac software as usual … it not the first time 
Sorry, I am not a Mac specialist, I am using my phone so it is difficult to establish what iOS you are on or what you updated from.
Or indeed what edition
I will leave it to someone else to decipher
You did not lose any accounting data. Your accounting data is not stored in the program. It is in a separate data file in your applications data folder. See the Guide: https://www.manager.io/guides/8394.
So what version of macOS are you on? (Sorry, @Mark, but that is not in the screen shots.) There have been some problems reported with macOS 11 (Big Sur), but not this one.
You also need to update your Manager software. You are more than 1,000 versions behind. Be sure you follow this Guide when updating: https://www.manager.io/guides/7116. After you have properly updated, come back to the forum and let us know whether you can open Manager.